Bump sshd-git from 2.9.0 to 2.9.1

Bumps [sshd-git](https://github.com/apache/mina-sshd) from 2.9.0 to 2.9.1.
- [Release notes](https://github.com/apache/mina-sshd/releases)
- [Changelog](https://github.com/apache/mina-sshd/blob/master/CHANGES.md)
- [Commits](apache/mina-sshd@sshd-2.9.0...sshd-2.9.1)

---
updated-dependencies:
- dependency-name: org.apache.sshd:sshd-git
  dependency-type: direct:production
  update-type: version-update:semver-patch
...

Signed-off-by: dependabot[bot] <support@github.com>

build.gradle

@@ -78,7 +78,7 @@ dependencies {
     testImplementation group: 'cglib', name: 'cglib-nodep', version: '3.3.0'
     testImplementation group: 'org.objenesis', name: 'objenesis', version: '3.3'
     testImplementation group: 'org.apache.sshd', name: 'sshd-core', version: '2.9.0'
-    testImplementation group: 'org.apache.sshd', name: 'sshd-git', version: '2.9.0'
+    testImplementation group: 'org.apache.sshd', name: 'sshd-git', version: '2.9.1'
 
     testImplementation gradleTestKit()
 }